Reboiler for ice-machines.



A. B. GBAF.

BEBOILER FOR ICE MACHINES. APPLICATION r1120 11111527. 1911.

1,236,927. 1 Patented Aug. 14,1917.

2 SHEETS-SIIEET I.

B. GRAF. REBOILER FOR ICE MACHINES.

APPLICATION FILED JAN. 27, 19H- Wm F a m -m m M m 5 Am m Mu m m N a an PANDREW B. GRAY, 0F CINCINNATI, OHIO.

BEBOILER FOR ICE-MACHINES.

Specification of Letters Patent.

Patented Aug. 14,1917.

Application filed January 27, 1917. Serial No. 144,940.

To aZZ whom may conccwi:

Be it known that I, ANDREW B. GRAF, a citizen of the United States,residing at Gincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Reboilers forIce-Machines, of which the following is a specification, reference beinghad. to the accompanying drawings.

his invention relates to an. im roved reboiler for ice nnichf and has.or its pri mary object to provide an ap iiaratus of this characterwhereby the use of live steam for the purpose of reheating or reboilingthe distilled water in the Illtin.llllfiilfitflll'fi of arti-- ficialice, is dispensed with, and the expense incident to the operation ofapparatus used in ice manufacture, appreciably reduced.

It is also another important object of: the invention to provide areboiler for ice machines wherein exhaust steam from the operatingengine and miscellaneous pumps used in the process of manufacture isutilized as the reheatingmedium for the water, such exhaust steam'beingso delivered to the reboiler as to remove the air from the water,together with'the grease and oil on. the sur-' face thereof, before thewater is admitted to the filtersl In the manufacture of clear,artificial ice from distilled water, it is necessary that the water bereboiled to free the air therefrom.

The distilled water is obtained from condensed exhaust steam, and duringthe sunrmer months when the atmosphere is from twenty to thirty degreescooler at night than during the day, the condensation of this exhauststeamis much more rapid at night,

so that when the water leaves the condenser,

it is cooled to approximately 180. It is necessary that the temperatureof the water again be raised to 212 by reboiling the same with livesteam in order to completely free the air from the .water. This is, ofcourse, a relatively expensive operation, and the present invention isdevised with a view to obviating the necessity of employing live steamfor this purpose and yet obtain a reboiler which will be highlyeilicient in operation.

By means of the present invention, the desirable end above referred tois obtained without materially increasing the initial cost ofconstruction of the apparatus.

With the above and otherobjects in view, my invention consists in thenovel features of construction, combination and arrangement of parts tobe hereinafter more fully described, claimed and illustrated in theaccompanying drawings, in which,

F gure 1 is a side elevation of a reboiler for ice machines,illustrating the preferred embodiment of the invention;

Fig. 2 is a longitudinal section thereof;

Fig. 3 is a transverse section taken on the line 3.3 of Fig. 2; and

4: is an'end elevation.

Referring in detail to the drawings, 5 designates a cylindrical tank orboiler which is suitably constructed to safely withstand a pressure ofapproximately twenty pounds to the square inch. To this boiler andentering through the top thereof, adjacent one of its ends, a steamexhaust supply pipe 6 is connected. In this pipe 6, cxteriorly of theboiler 5, a cruciform coupling head 7 is interposed. A pipe 8 from thecondenser '(not shown), extends into this head and then longitudinallyinto the ipe 6 toward the boiler, and is provided wit a spray nozzle 9.To the lower end of the pipe 6, within the tank 5, a horizontallydisposed pipe 10 is connected, said pipe extending longitudinally of thetank 5 and being supported in a suitable hanger indicated at 11. Aplurality of spacedejection pipes 12 extend transversely of the boiler 5and beneath the pipe 10, and are suitably coupled to the latter pipe.Each of these transverse ejection pipes 12 is provided in its lower.

maintainedat this level by means of a float 15 secured upon the stem 17of a valve 18. This valve is adaptedfor engagementupon its seat .fomned.on the wall of a casing 19 which is attached to the end of a leading tothe filter, (not shown). he side walls of this casing are provided withopenings so that the water may freely enter within the same. A rod 21also extends upwardly from the float 15 and is movable ipe 20 through ahousing 22 mounted upon the top witl'rjj'the desired water level withinthe "boiler, and the opening of the valve 18 with relation to thewater-level, redetermined. The upper end of the rod, 2 is covered by :aremovable cap 25 threaded upon the wall of thehousing'22. A suitablegage glass indicated at 26, is mounted upon one end ,the boiler 5 sothat the level of water within] the boiler may be athll timesascertained.

A pipe 27 connects the boiler 5 to the condenser to carry oil thesurplus exhaust steamlt'o be condensed, and the water there'- fromdelivered through the pipe 8 into the exhaust steam supply pipe 6. Anair outlet valv 28 is also mounted in the top wall of a the boiler 5 torelease the air collecting in the upper portion of the boiler which isnot a blown out by the steam jets over the dam l4 and through the drampipe 29 which 6 leads'to the sewer. If all of the air does not escape inthis way, it will find an outlet through the air valves of thecondenser.

engine and pumps is delivered'through the pipe 6 into the feed pipe 10,from which it enters the ejection pipes 12. The steam is delivered fromthe latter pipes through the angular ports or openings 13 under con--the upper ed siderable pressure, against the surface of the watercontained in the boiler. The

. steam blowing over the surface of the water removes all oil or easewhich runs over? of the skimming dam 14 into, the end of t e boiler andout through the drain ipe 29. When the water in the boiler is at t epredetermined level, the float valve,

18 opens automatically and allows a certain uantity of the water toescape through" the pipe 20 to the filters. The steam leavesthe tank 5through the pipe 27, from which,

- itJis delivered to the condenser, the conv -y'densed water runningback; through the f pipe 8 from the condenser and being sprayed into theipe 6 to be there highly heated" by the ex aust steam and carried withthe; .T fsteam into the pipes 12.

densed water, when deliveredthrough the 7 ports 13 to the boiler 5, isat a boiling tern-.

perature, and the air is released therefroinf to be exhausted throughthe valve 28 or escape through the pipe 27 to the condenser. From theforegoing description, taken in connection with the accompanying drawings,.the construction, manner of operation and several advanta es of myinvention will be clearly and ully understood. By avoiding the necessityof maintainin "a separate supply of live steam to the rebo1 er, I havedemonstrated in practice that the "Letters Patent is:

-ming 2. In a'reboiler a, tank,- a'pipe connection Thus, the can.

cost of maintenance and operation of ice vmaking machines of thischaracter can be materially reduced. At .thesame time, it

will be observed that the construction of the reboiler is not undulycomplicated, but on the'other hand, is relatively simple and 'itsinitial manufacturing cost will, therefore, be comparatively small. Thetank or boiler 5 can, of course, ,be made of any desired capacity, and;while I have shown a particular mounting-and arrangement of the floatvalve herein referred to, this, feature of the device might be variouslymodified 1 and valves ofother types substituted thereto =to'1controlthe'rintermittent flow of water from the reboiler to the filters. Theinven"-' tion is also susceptible Off various other modifications in theform, proportion and arrangement of its several parts and I, therefore,reserve the privilege of ado ting all such legitimate changes as may beiizirly invention-as claimed.

Having thus fully described my invention, what I desire toclaixn'andsecure by 1.:A reboiler'for ice making machines includingatank, an, outlet pipe connected to I 'In operation, the exhaust steamfrom the ing the outlet toimaintain a predetermined water level withinthe tank, a skimming dam within said tank, and means for de l vermgexhaust steam m en-angular direction upon-the surface of the water todirect the grgase and oil'therefrom overthe skimami.

to one end ofthe tank, an automatic valve normally closing said pipe tomaintain a predetermined water level in the tank, a

embodied within the spirit and scope of the skimming :dam arran ed inthe tank adjas P cent its opposite en a drain pipe connected to thelatter end of the tank, an exhaust steam supply pipe connected to thetank, a water pipe connection between said supply plpe and thecondenser, means for deliveringthe exhaust steam and the con-' 7 densed.water upon the surface ofthe water in the tank at an anglewith respectthereto to cause foreign accumulations on the surface of the water toflow. over .the skim dam, and'a pipe connected'to the tankand leading tothe condenser to conduct the ex haust steam to the latter. L

A reboiler for ice makingmachines' *eludi end 0 the tank, an automaticvalve nor a" tank, a pipe connectionto one mally closing-said pipe andmaintaining the tank, a pipe connec tojsaid' steam predetermined levelof water inf-the; tank," J

an exhaust steam supply i y ato 'de iver condensed water into saidpipe;7 whereby the temperature o'f' the water is raised to the boiling point,and a pluralityof ejection pipes connected tosaid steam supply pipewithin the tank todeliverthe boiling water and exhaust steam upon thesurface of the water, in the tank.

4.,In a reboiler for ice making machines, a tank, a pipe connection tooneend of said tank, an automaticvalve normally closing said pipe andmaintaining the water in the tank at a predetermined level, a skimmingdam arranged in the tank adjacent its op-,

posite end, an exhaust steam suppl pipe extending into the tank, a pluraity of spaced delivery pipes connected to the supv, ply pipe and havingejection orifices angularly disposed toward the skimming dam, a pipeextending from a condenser to deliver condensed water into the exhauststeam supply pipe, whereby said water is heated.

to the boiling point and delivered with the exhaust steam from theejection pipes upon the surface of the water inthe tank, foreignmatteron the surface of the water being directed by th steam jets over theskimming dam, and an outlet pipe for the exhaust steam connected to thetank and lead-- ing to the condenser. I

5. A reboiler for ice making machines including a tank having an outletat one end, a skimming dam within thetank limiting the water leveltherein, and means for delivering steamupon the surface of the Wa-' terto raise the temperature of the water to the boiling point and directgrease and oil from the water surface over the skimming dam.

6. A reboiler for ice makin machines including a tank having an out etat one end, a skimmin dam within the tank limiting the Water leveltherein, a steam pipe connected to the tank, steamdelivering meanswithin the tank to deliver the steam in an angular direction upon thesurface of the water and direct the grease and oil therefrom over theskimmmg dam, and means for discharging condensed steam into the steamsupply pipe whereby the same is highly heated prior to its delivery intothe v tank.

7 A'reboiler for ice makin machines including a tank havin an out et atone end, a skimmin dam wit in the tank limiting the water i nected tothe tank, steam delivering means within the tank to deliver the steam inan angulandirection upon the surface of the water and direct the ase andoil therefrom over the skimming dam, and means vel therein, a steam pipecon-v for s raying condensed steam into the steam supp y pipe, wherebythe condensed steam .is highly heated prior to its delivery into thetank. 4 v 8. A reboiler for ice making machines including a tank, meansfor maintaining a predetermined water level in the tank, and

means for deliverin a plurality of steam jets in an angular irectionupon the surof the water to the boiling point and disface of-the waterto raise the temperature charge air, grease oilfrom the water surface.

' 9. A reboiler for ice making machines in- In testimony whereof Ihereunto afiix my signature in the presence of two witnesses.

ANDREW B. GRAF. Witnessesz' IIENR! J. FRANZ,

ANDREW J. Gnar, Jr.

